Shulou(Shulou.com)05/31 Report--

This article mainly introduces "what are the methods of quickly restoring mistakenly deleted database data". In daily operation, I believe that many people have doubts about the methods of quickly restoring mistakenly deleted database data. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "what are the methods of quickly restoring mistakenly deleted database data?" Next, please follow the editor to study!

In our daily work, we often delete data by mistake. When delete and drop tables are not added with purge, we can restore them quickly by:

(1) when delete mistakenly deletes data:

We can restore it by constructing a consistent read, as long as the mistakenly deleted data is found in time, and the current undo block or undone is soon not overwritten.

Create table quick_table as

Select * from emp_temp as of timestamp (SYSTIMESTAMP-INTERVAL '60' MINUTE)

At this point, the quick_table contains the data of the table 60 minutes ago, and the 60 here can be changed according to the actual situation.

(2) when drop mistakenly deletes the table:

The premise is that instead of using drop table XX purge to delete the table, we can delete the table through drop table XX, at which point we can use:

Flashback table XXX to before drop

In order to make a quick recovery.

At this point, the study on "what are the methods of quickly restoring mistakenly deleted database data" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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